AZ105 alloy, the strongest aluminum on the Marucci bat line, allows for thinner barrel walls, a higher response rate and better durability Multi-variable wall design creates an expanded sweet spot and thinner barrel walls that are more forgiving after off-centered contact 6th Generation AV2 Anti-Vibration knob features an upgraded, finely tuned harmonic dampening system for better feel and less negative vibrational feedback Ring-free barrel construction allows for more barrel flex and increases performance with no "dead" spots Precision-balanced barrel results in a lower M. O. I. and balanced feel for precision and control.